Best Seller. Slastix Toner Resistance Tubing comes in a variety of resistance levels for people at all fitness levels. The latex material that is often used to make workout bands and resistance tubes is susceptible to weakening by ultraviolet light, body oils, and nicks and cuts that occur from regular use. The Slastix Toner Resistance Tubing uses a safety sleeve to encapsulate the latex tubing and prevent it from the hazards that could otherwise shorten its lifespan. 50' L. Rubber tubing covered by protective, nylon sleeve. Resistance is color-coded by strap.